Variation of inulin content, inulin yield and water use efficiency for inulin yield in Jerusalem artichoke genotypes under different water regimes

ABSTRACT Cowpea is a legume of great socioeconomic importance for the North and Northeast regions of Brazil. However, studies to evaluate its production performance when cultivated under irrigated regime and under different plant densities are necessary. The objective of this work was to evaluate the effects of different water regimes and different plant densities on grain yield, production components and water use efficiency, and on the correlation between grain yield and production components of BRS Tumucumaque cowpea cultivar. The experiment was carried out at Embrapa Meio-Norte experimental area, in Teresina, Piauí State, Brazil, from June to September 2017, in an Argissolo Vermelho-Amarelo eutrófico (Ultisol). A randomized complete block design was used, in a split-plot scheme with four replicates, in which the water regimes occupied the plots (187.7; 233.5; 263.5 and 288.7 mm) and plant densities, the subplots (12; 16; 20 and 24 plants m-2). The number of pods per plant, number of pods per square meter, pod length, dry grain yield and water use efficiency were evaluated. The maximum dry grain yield reached was 1,694.46 kg ha-1, with application of 288.7 mm and density of 20.4 plants m-2. The production component number of pods per square meter was the most correlated with dry grain yield.

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Effect of Moisture Regimes on Water use Efficiency of Rabi / Summer Groundnut Genotypes in Northern Transition Zone of Karnataka

Indian Journal of Agricultural Research ◽

10.18805/ijare.a-5651 ◽

2021 ◽

Author(s):

R. Naveen Kumar ◽

R.H. Patil ◽

B.S. Yenagi ◽

S. Sagar Dhage

Keyword(s):

Water Use Efficiency ◽

Transition Zone ◽

Water Use ◽

Irrigation Water ◽

Water Regime ◽

Moisture Stress ◽

Irrigation Regime ◽

Water Regimes ◽

Pod Yield ◽

Use Efficiency

Background: During rabi / summer irrigation water is a scarce resource, but crop needs more water due to non-rainy season and warmer climate. Hence, a field experiment was conducted during rabi / summer season of 2016-17 to study the effect of irrigation water regimes on water use efficiency (WUE) of groundnut genotypes in Northern Transition Zone of Karnataka. Methods: This field study comprised of four main plots as water regimes viz. I1: (control) seven irrigations at 15 days interval from sowing to 105 DAS, I2: Stress at pegging stage; withdrawal of one irrigation between 45 - 60 DAS, I3: Stress at pegging and pod filling stage; withdrawal of two irrigations between 45-75 DAS, I4: Stress at pegging, pod filling and kernel development stage; withdrawal of four irrigations from 45-105 DAS and four genotypes as sub plots viz. G1: Dh-86, G2: Dh-101, G3: K-9 and G4: G2-52. Treatments were replicated thrice and laid out in split plot design. Result: Among the water regime, I2 recorded significantly higher WUE (6.2 kg ha-1 mm-1) followed by I1 (control; 5.5 kg ha-1 mm-1). Water regime I2 also recorded significantly higher pod yield and haulm yield (2,857 kg ha-1 4,648 kg ha-1, respectively) along with other yield attributes, but was found at par with control (I1). This study showed that WUE as well as yield of rabi / summer groundnut can be enhanced if crop was exposed only to mild stress by skipping an irrigation at pegging stage out of total seven irrigations. Among the genotypes, Dh-86 with 2,375 kg ha-1 of pod yield performed significantly better over others like Dh-101 (2,215 kg ha-1), K-9 (2,048 kg ha-1) and G2-52 (1,880kg ha-1) suggesting differential response to moisture stress, thus choice of moisture stress tolerant genotypes is equally important to enhance WUE. Interaction between irrigation regime and genotypes showed that Dh-86 (G1) with I2 irrigation regime recorded significantly higher WUE (6.9 kg ha-1 mm-1), pod yield (3,168 kg ha-1) and net return (Rs. 95,655 ha-1) and was found at par with full irrigation regime (I1).

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PRODUTIVIDADE DE COLMOS E EFICIÊNCIA DO USO DA ÁGUA EM CANA-DE-AÇÚCAR IRRIGADA POR GOTEJAMENTO SUBSUPERFICIAL

Irriga ◽

10.15809/irriga.2019v24n1p162-176 ◽

2019 ◽

Vol 24 (1) ◽

pp. 162-176

Author(s):

Eduardo Magno Pereira da Silva ◽

Aderson Soares de Andrade Júnior ◽

Edson Alves Bastos ◽

Valdenir Queiroz Ribeiro

Keyword(s):

Water Use Efficiency ◽

Water Use ◽

Block Design ◽

Saccharum Officinarum ◽

Productive Performance ◽

Irrigation Planning ◽

Water Regimes ◽

Sugarcane Varieties ◽

Use Efficiency ◽

E Mail

PRODUTIVIDADE DE COLMOS E EFICIÊNCIA DO USO DA ÁGUA EM CANA-DE-AÇÚCAR IRRIGADA POR GOTEJAMENTO SUBSUPERFICIAL EDUARDO MAGNO PEREIRA DA SILVA1; ADERSON SOARES DE ANDRADE JÚNIOR2; EDSON ALVES BASTOS2 E VALDENIR QUEIROZ RIBEIRO2 1Universidade Federal do Piauí (UFPI), Centro de Ciências Agrárias, Programa de Pós‑Graduação em Agronomia, Campus Socopo, Rua Dirce Oliveira, S/N, Ininga, CEP 64048‑550 Teresina, PI, Brasil. e-mail: [email protected] 2Embrapa Meio‑Norte, Avenida Duque de Caxias, n° 5.650, Bairro Buenos Aires, CEP 64006‑220 Teresina, PI. Brasil, e-mail: [email protected], [email protected], [email protected] 1 RESUMO O objetivo desta pesquisa foi avaliar a produtividade de colmos e a eficiência de uso da água de variedades de cana-de-açúcar (cana planta) em resposta a diferentes regimes hídricos aplicados por gotejamento subsuperficial. O experimento foi realizado em um Argissolo Vermelho Amarelo distrófico, na Embrapa Meio-Norte, em Teresina, Piauí, Brasil, durante o período de outubro de 2015 a setembro de 2016. Utilizou-se o delineamento experimental de blocos casualizados em parcelas subdivididas, com quatro repetições. As parcelas foram constituídas por quatro regimes hídricos (irrigação mais precipitação pluviométrica) baseados em frações da evapotranspiração de cultura (50% ETc = 1.374,3; 80% ETc = 1.534,2; 110% ETc = 1.712,0 e 150% ETc = 1.905,8 mm) e as subparcelas por dez variedades de cana-de-açúcar (RBUFRPE01, RBUFRPE02, RBUFRPE03, RBUFV01, RB036066, RB987935, RB935744, RB943538, RB92579 e RB867515). A variação do regime hídrico promoveu alteração na performance produtiva e na eficiência do uso da água. A máxima produtividade de colmos (222,9 Mg ha-1) foi obtida com a variedade RB935744 e a lâmina total aplicada de 1.688,8 mm. A maior eficiência do uso da água (13,5 kg m-3) foi obtida com a variedade RB935744, aplicando-se lâmina total de 1.606,2 mm. Palavras-chave: Saccharum officinarum, performance produtiva, planejamento de irrigação. SILVA, E. M. P.; ANDRADE JÚNIOR, A. S.; BASTOS, E. A.; RIBEIRO, V. Q.STALKS YIELD AND WATER USE EFFICIENCY OF SUGARCANE IRRIGATED BY SUBSURFACE DRIPPING 2 ABSTRACT This study aimed to evaluate stalks yield and water use efficiency of sugarcane varieties (cane plant) in response to different water regimes applied by subsurface drip irrigation. The experiment was carried out in a dystrophic Yellow Red Argisol at Embrapa Middle North, Teresina, Piauí State, Brazil, during the period from October 2015 to September 2016. The experiment was designed in a randomized block design in subdivided plots, with four replications. The plots consisted of four water regimes (irrigation plus rainfall) based on culture evapotranspiration fractions (50% ETc = 1,374.3 mm, 80% ETc = 1,534.2 mm, 110% ETc = 1,712.0 mm and 150% ETc = 1,905.8 mm) and subplots per ten varieties of sugarcane (RBUFRPE01, RBUFRPE02, RBUFRPE03, RBUFV01, RB036066, RB987935, RB935744, RB943538, RB92579 and RB867515). The variation of the water regime promoted a change in productive performance and water use efficiency. The maximum stalks yield (222.9 Mg ha-1) was obtained with variety RB935744 and the total applied depth of 1,688.8 mm. The greater efficiency of water use (13.5 kg m-3) was obtained with variety RB935744, applying total depth of 1,606.2 mm. Keywords: Saccharum officinarum, productive performance, irrigation planning.

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